Rod-bending machine.



PATEN'TED NOV. 22, 1904.

W.. J. KURTZ.

ROD BENDING MACHINE.

APPLIOATION FILED MAR. 1, 1904.

,2 SHEETS-SHEET 1.

N0 MODEL.

hieraan PATENTED NOV. 22, 1904.

W. J. KURTZ.

ROD BENDING MACHINE.

APPLIGATION FILED MAR. 1, 1904.

2 SHEETS-SHEET 2.

NO MODEL.

071.1 van 104:

l I l xNirED Srnrss Patented November 22, 1904.

- PATENT @reine ROD-BENDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 775,774, dated November 22, 1904.

Application filed March l, 1904. Serial No. 196,000. (No model.)

To (til 11172/0711/ it 711,601/ lconcern:

Be it known that I, WILLIAM JACOB KURTZ,

a citizen of the United States of America, resid ing at McKeesport, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Rod- Bending Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention has relation to machines for making molders gaggers, and has for its object the provision of means whereby gaggers, which are small pieces of bent metal used by molders to assist in holding the sand in placewhereby the services of the skilled workmanrequired in making these'articles may be dispensed with, the quantity produced by a workman in a given time may be increased, and the cost reduced to a minimum, while at the same time the articles produced will be :more regular in form and of more exact length than the hand-made articles.

Having the above object in view, I have devised the mechanisms hereinafter described and claimed, and illustrated in the accompany-f ing drawings, and constituting my invention.

In the said drawings, Figure 1 is a side elevation of my improved machine for making gaggers. Fig. 2 is a vertical sectional view of the same. Fig. 3 is a detail view in plan and elevation of one ofthe parts of the machine. Fig. 4 is a front view of the machine shown in Fig. 1. Fig. 5 is aside view of part of the framing of the machine and of part of the gaging devices of the machine. Fig. 6 is an end view of therparts shown in-.Fig 5. A

The frame of the machine is composed of two upright standards 1 2, suitably supported on a base 3, to which the standards are attached by angle-braces 4 4. Brackets 5 5 are attached to the'angle-braces 4 4 and to the standards 1 2 and supportbetween them atable 6, having a downwardly-inclined extension 7, an anvil-block 8 being mounted between the standards, with its lower edge on alinement with the top of the table 6. The standards 1 2 are formed with vertical ways 9, and a vertically-movable rack-bar 10 is arranged between the standards and slides on the said ways. The rack-bar 10 is pierced at its lower end, as shown at 11, and a cutter-jaw 12, formed with an orifice 13, coinciding with the hole 11 in the rack-balais fixed 'in position between the standards 1 2, so that the lower end of the rack-bar and the said cutter-jaw constitute shears adapted to sever a rod passing through the holes 11 and 13 when the rackbar is moved longitudinally. The'cutter-jaw 12 is adjustably mounted in the standards, being held in position by horizontal -bolts 14, that pass through holes 15 in the standards, a row ofV these holes being formed in each standard and extending from above the anvil-block to a point near'the tops of the standards.

Brackets 16 16 extend outwardly in front of the standards, and in the brackets 16 is pivotally supported, by means of a bol't 17, a swinging arm 18, which carrieson its lower end a triangular block 19, having its lower side 2O at right angles to said arm 18. Brackets 21"projectfromf the standards 1 2 below the-brackets 16, these-brackets being provided for the attachment of an arm 22, which carries a triangular block 23 at its lowerend, this arm and block being shown' in detail in Fig. 3 and being identical in construction with the arm 18 and the block 19 except that the arm 22 is shorter than the arm 18, the arm 22 and its block 23 being adapted to be substituted for the arm 18 and block 19 when certain sizes of gaggers are to be made -in the machine, as will be hereinafter described.

Brackets 24, which may be made integral' with the brackets 16, serve as-journals for a shaft 25, upon which is loosely mounted a gear-wheel 26, that meshes with the rack-bar 10, and the said shaft 25 serves also as a pivot for a bent lever 27, which is formed with bi- `fui-cated arms28 28, that embrace the gear- IOO IYS

`position under the pull of the spring.

wheel 26` said levers being connected to arm 18 by a link 18. A toothed block 29 is slidably mounted between the bifurcated arms 28 of lever 27being supported and guided by pins 30 passing through the block and bearing on the top and. bottom of each bifurcated arm. A rod 31 is pivotally secured to ears 32 on the back of the block 29 and at its other end is pivotally secured to a rocking lever 33, pivoted at 34 to the lever 27. Upon that end of the rocking lever to which the rod 31 is attached an eye 35 is formed that .receives one end of a spiral spring 36, the opposite end of which is secured to the lever 27, and to the opposite end of said rocking lever 33 a rod 38 is attached, the other end of said rod 38 being attached to a bell-crank lever 39, which is pivoted at 40 to the lever 27, the free end of said bell-crank lever constituting a handle or grip by means of which through the rod 38, the rocking lever 33, and the rod 31 the toothed block 29 may be pressed into engagement with the gear-wheel 26, the said block 29 being moved out of engagement with the gear-wheel when the grip or handle 41 is released by the spring 36.

Upon the outside of .the standard 2 is pivotally mounted. a sleeve 42, said sleeve being pivoted 'at 43 to the standard and formed with a rearwardly-projectiug arm 44, to which is attached one end vof a spiral spring 45, the other end of which is attached to the standard 2, the said spring serving to maintain the sleeve normally in a horizontal position and a stop 46 serving to limit the movement of the sleeve, so that it will not pass such horizontl gage-rod 47 passes through the sleeve 42 and is held at any position to which it may be adjusted in the sleeve by a set-screw 48C The outer end of a gage-rod 47 carries a gageplate 48, the said gage-plate being' disposed at right angles to the gage-rod 47 and projecting upwardly above the same and being formed with a guide-plate 49 on one of its ends, which is engaged by a pin 50, projecting laterally from the upper corner of the triangular 'block 19 on the swinging arm 18.

The machine being constructed as above described and shown in the accompanying drawings is operated in the following manner: A rod 51 of the proper size for the formation of the gaggers is passed through the hole 11 in the bottom of the rack-bar 1() and through the hole 13 in the cutter-jaw 12 and pushed forward until it contacts with the gage-plate 48, which has been previously adjusted to the position vnecessary to secure the length of gagger desired, the holes 13 and 11 being in alinement at this time. The lever 27 is now drawn' down and the swinging arm 18 depressed and gradually brought to the position shown in Fig. 1 of the drawings in dotted lines. During the first part of the movement of the swinging arm 18 the pin 50 on the triangular block 19 will contact with and ride against the edge of the guide-plate 49 and eventually contacting with the rod 47 will depress the rod and the gage-plate, so as to carry the same downwardly beneath the table 6 7. The lower corner of the swinging arm 18 will at the first movement of the swinging arm contact with the outer end of the rod 51 and will bend the rod downwardly, the latter bending over the outer edge of the hole 13 in the cutter-block 12, and this bending of the rod will continue during the entire movement of the arm 18, iinally resulting in the rod 51 being bent downwardly in alinement with the front of the standards, and consequently at a right angle to that po'rtion of the rod which remains outside the hole 11 in the sliding rack 10. As soon asthe outer end of the rod 51 reaches the inclined portion 7 of the table 6 it begins to bend outwardly, and the continuation of the movement of the swinging arm 18 results in the end of therod being bent at a right angle to the portion which is in alinement with the standards between the table 6 and the face 2() of the triangular block 19. Just previously to the completion of the right-angular bend of the rod 51 the grip or handle 41 is pressed toward the lever 27. This movement ofhandle 41 forces the toothed block 29 into engagement with the gear-wheel 26, and the latter now turning with the lever 27 elevates the rackbar 10 and shears off the bar 51 at the juncture of the holes 11 and 13, this shearing olf of the bar occurringsubstantially at the same moment as the completion of the bending of the bar 51, and the bent section thus cut ofi' from the bar 51 constituting the complete gagger. The lever 27 is now raised to its elevated position, the handle or grip 41 being released, so that the spring 36 will pull the toothed block 30 out of engagement with the gear-wheel 26, whereupon the gear-wheel being loose on its shaft will turn freely and permit the rack-bar 10 to drop and bring the hole 11 therein again into alinement with the hole 13 in the cutter-jaw 12. Meanwhile by the upward movement of the swinging arm 18 the gage-rod 47 is allowed to move upwardly and will eventually reassume its position in alinement with the holes in the cutter-jaw and the rack-bar. The down ward movement of the rack-bar 10 is limited by the lowermost tooth of its rack, which comes into Contact with the Lipper surface of the cutter-jaw l2.

When the swinging arm 18 is employed in connection with the machine, the cutter-jaw 12 is located in the position shown in the drawings; but when the swinging arm 22 is to be used the cutter-jaw is adjusted to a position below the bracket 21, in which said swinging arm 22 is pivoted, this substitution and adjustment of parts being done when it is de sired to make gaggers having short body portions, and it will be understood that with the IOO IIO

short'swinging arm 22 the cutter-jaw l2 can be lowered to any point between the bracket 2l and the top ot' the anvil 8. Vhen the shorter swinging arm 22 is used, the gage-bar 47 is adjusted in the sleeve 4:2, so that the gageplate will be in proper position for engagement with the projecting arm on the side of the triangular block 23 and will properly gage the length of rod appropriate for the forma-A tion of the desired size of gagger.

Having fully described my invention, I claim- 1. In a machine for forming gaggers, the combination of a cutter-jaw, a swinging arm, a stationary table, a sliding rack-bar, adapted to move past said cutter-jaw and constituting in connection therewith shears, with means for moving said swinging jaw and means for moving said rack-bar, substantially as described.

Q. In a machine of, the type described, the combination of a supporting-frame, a swinging gage carried on said frame, a swinging' arm adapted to move said gage, a cutter-jaw mounted in the framing of the machine', a sliding bar adapted to operate in conjunction with said cutter-jaw to sever a rod passing between the cutting edges of said bar and said jaw, means for moving said swinging arm to bend a rod arranged to be cut by the sliding bar, and means carried by the moving means of the swinging arm for moving said bar relatively to the cutter-jaw.

3. In a machine of the type described, the combination of vertical standards, a table mounted in proximity to said standards, an anvil mounted on the standards, a cutter-jaw mounted on the standards, a sliding rack-bar having a cutter edge adapted to coact with the cutting edge of said cutter-jaw, a lever pivotally mounted on the standards, a gearwheel journaled on the standards and meshing with said rack-bar, a lever pivoted on the standards, a sliding member mounted on said lever and adapted to engage said gear-wheel, means for moving said member into and out of engagement with said gear-wheel, a swinging arm journaled on the standards and con-` nected to said lever, and a movable gage adapted to be moved into and out of alinement of said cutter-jaw by the movement of said lever.

4. In a machine of the type described, the combination with supporting-standards of adjustable cutting means mounted thereon, a

swinging arm, a lever for swinging said arm,

and for operating said cutting means, a stationary table over which said arm is adapted to swing, said arm being adapted to bend a section of metal between the said standards and the said table.

5. In a machine of the type set forth, gage means, bending means in engagement therewith, cutting' devices operated by said bending means, said bending means arrangedto move the gage means therewith, and means for returning' the gage means to its normal position simultaneously with the bending means. In testimony whereof I aHiX my signature in the presence ot' two witnesses.

WILLIAM JACOB KURTZ. Witnesses:

H. C. EvER'r, W. H. CUNNINGHAM. 

